Josef Newgarden takes the 10th turn during the first race of the IndyCar Detroit Grand Prix auto racing doubleheader, Saturday, June 1, 2019, in Detroit. (AP Photo/Carlos Osorio)

Spectators on Belle Isle were advised to exit the stands and seek shelter about 90 minutes before the scheduled start of the first race of IndyCar Detroit Grand Prix's auto racing doubleheader, Saturday, June 1, 2019, in Detroit. (AP Photo/Carlos Osorio)

Simon Pagenaud, of France, drives through the second turn during a practice session for the first race of the IndyCar Detroit Grand Prix auto racing doubleheader, Friday, May 31, 2019, in Detroit. (AP Photo/Carlos Osorio)

Alexander Rossi, right, talks to a media member after a practice session for the first race of the IndyCar Detroit Grand Prix auto racing doubleheader, Friday, May 31, 2019, in Detroit. (AP Photo/Carlos Osorio)

Alexander Rossi takes the 10th turn during the first race of the IndyCar Detroit Grand Prix auto racing doubleheader, Saturday, June 1, 2019, in Detroit. (AP Photo/Carlos Osorio)

Alexander Rossi autographs caps after qualifying for the pole for the first race of the IndyCar Detroit Grand Prix auto racing doubleheader, Saturday, June 1, 2019, in Detroit. (AP Photo/Carlos Osorio)

An inclement weather warning is displayed on Belle Isle before the first race of IndyCar Detroit Grand Prix's auto racing doubleheader, Saturday, June 1, 2019, in Detroit. Spectators were advised to exit the stands and seek shelter about 90 minutes before the scheduled start of the race. (AP Photo/Carlos Osorio)

Scott Dixon, of New Zealand, takes the second turn during a practice session for the first race of the IndyCar Detroit Grand Prix auto racing doubleheader, Friday, May 31, 2019, in Detroit. (AP Photo/Carlos Osorio)